Question # 1

The bunding energy per nucleon for iron is.

Choose an answer

zero

Maximum

Negative

Minimum

What is the overall gain, if three amplifiers each with a gain of 30 are cacaded.

Choose an answer

30

90

270

27,000

Which term given below refers to the concept moving clocks run slower than clocks at rest w.r.t an observer.

Choose an answer

Simultaneously

Mass variation

time dilation

Length contraction

Alpha particles are used for the treatment of skin of a patient due to.

Choose an answer

Highly ionizing power

Low penetration power

Positively charged particles

Helium nucler

An important property of an ideal power supply is.

Choose an answer

Infinite internal resistance

Zero internal resistance

Large output resistance

Small output resistance

The gama rays have

Choose an answer

Thin tracks

Thick tracks

No definite tracks

Continuous tracks

Which experiment is a demonstration that matter and energy can display properties of both waves and particles.

Choose an answer

young's double slit experiment

Division germier experiment

Heisenberg's uncertainty experiment

Stern Gerlach experiment

An emitter follower has

Choose an answer

High input impedance and high output impedance

High input impedance and low output impedance

Low input impedance and low output impedance

Low input impedance and high output impedance

The radius of first Bohr's orbit for hydrogen atom is.

Choose an answer

0.53 m

0.53 nm

0.053 nm

0.53 mm

On which factor cut off wavelength of X-rays coming from a Coolidge tube depends upon.

Choose an answer

Target material

Accelerating voltage

Filament temperature

Separation between target and the filament

Which of the following is required for maintaining sustained chain reaction.

Choose an answer

Neutrons

Protons

Electrons

Photons

The SI unit of equivalent dose is

Choose an answer

Seivert

Gray

Radian

Rem

The half life of a given radioactive isotope is 10 years The original mass of the isotope is 12 g What mass of this isotope remains un decayed after 20 years.

Choose an answer

0.5 g

1.2 g

3.0 g

6.0 g

LED is a p-n junction that emits

Choose an answer

Visible light

X- rays

Ultraviolet light

electromagnetic waves

Ionization of a hydrogen atom originally in its ground state takes a minimum out of energy equal to.

Choose an answer

2.4 J

4.2 J

12.3 eV

13.6 eV

The particles equal in mass or greater than protons are called.

Choose an answer

Mesons

Bosons

Baryons

Nucleons

Negative feedback

Choose an answer

Increases stability

Decreases stability

Produces oscillatory

Cannot occur

The reciprocal of decay constant lamda of a radioactive substances is equal to.

Choose an answer

total life

Half life

Mean life

Curie

What is the quantitative description of the effect of radiation on the living tissue.

Choose an answer

Radiation dosimetry

Radioactive dating

Telemetry

Dosage

Sub atomic paticles whihc does not experience strong nuclear force are.

Choose an answer

hadrons

Photons

Leptons

Nucleons

More Classes

Other Links

PPSC Physics Chapter 7 Modern Physics MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer